436 



DIGESTIVE SYSTEM OF THE HORSE 



The right border (Margo dexter) is thin and long; it extends backward usually 

 to the sixteenth rib, a little below its middle.^ 



The left border (Margo sinister) is thin and convex. It begins at the left side 

 of the oesophageal notch, about a handbreadth ventral to the fourteenth thoracic 

 vertebra. It curves downward, outward, and somewhat forward to a point opposite 



Renal impression 



Caudate process 



Posterior vena cava 



Attachment of gastro-pancrentic fold 

 Portal vein 

 Portal fissure 

 Hepatic artery . 



Attachment of lesser omentum 

 Hepatic duct 

 CEsophageal notch 



Left lateral 

 ligament 



Left 

 border 



Umbilical fissure 



Fig. 373. — Liver of Horse; Visceral Surface. 

 Specimen from middle-aged subject, liardened in situ. The fissure between the left and middle lobes is shown but 



not marked. 



the ventral end of the ninth rib, and then runs forward about parallel with the 

 costal arch as far as the ventral end of the seventh rib. The ventral and lateral 

 borders together constitute the margo acutus. 



The liver is held in position largely by the pressure of the other viscera and 

 by its close application and attachment to the diaphragm. It has six ligaments. 



' The right border varies much in subjects in the dissecting room, since in old subjects the 

 right lobe is often greatly atrophied. Atrophy of the left lobe is extremely rare. 



